Graco 01/0055-1AO/89 HD Nylon Piston 11.293 x 0.194

Compatible Machines

The Graco 01/0055-1AO/89 HD Nylon Piston 11.293 x 0.194 is designed for select Graco airless sprayer pump assemblies that require a 11.293” piston with 0.194 tolerance and HD nylon construction for high-pressure performance.

• Graco Ultra Max II Series (specific mid-frame pump configurations)
• Graco Mark Series Airless Sprayers (compatible pump assemblies only)
• Graco GH Hydraulic Airless Systems (matching piston specification required)
• Graco 390 / 395 / 490 / 495 Professional Sprayer Units (select configurations)
• Graco OEM pump rebuild kits requiring 11.293 x 0.194 HD Nylon pistons

What is the Graco 01/0055-1AO/89 HD Nylon Piston 11.293 x 0.194?

The Graco 01/0055-1AO/89 is a precision-engineered piston component used in professional-grade airless spray pump systems. Manufactured from HD Nylon, it delivers a balance of strength, dimensional stability, and low-friction operation under continuous hydraulic pressure.

With exact dimensions of 11.293 x 0.194, this piston ensures accurate sealing and smooth reciprocating movement within Graco pump cylinders, supporting consistent spray pressure and uniform coating output across demanding applications.

It is commonly used in pump rebuilds and maintenance where OEM-level fitment and long-term durability are required.

Key Features & Benefits

• HD Nylon construction for durability and wear resistance
• Precision-machined 11.293 x 0.194 dimensions
• Supports stable high-pressure airless spray performance
• Reduces internal wear and improves pump efficiency
• Compatible with select Graco professional spray systems

Applications

Used in industrial painting, protective coatings, commercial construction finishing, and equipment maintenance operations where Graco airless sprayers operate under continuous high-pressure conditions.

Frequently Asked Questions